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Fencer Vulns
critical 9.3

CVE-2026-47187 json

SSHFS Symlink Escape: Rogue SFTP Server → Local File Read/Write

published 2026-08-19 2 mo ago modified 2026-09-09 1 mo ago also EUVD-2026-62493

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

SSHFS is a network filesystem client for connecting to SSH servers. Prior to version 3.7.6, a rogue SFTP server can return absolute symlink targets or relative targets containing parent-directory components that SSHFS passes through FUSE for resolution by the client kernel against the local filesystem. The documented transform_symlinks mitigation does not contain relative targets because transform_symlink() returns early at sshfs.c:2181, while sshfs_readlink() at sshfs.c:2234 to sshfs.c:2236 otherwise copies the server-supplied link target to the kernel. A victim or victim-side tool that follows such a link through ordinary operations such as cp, rsync, backup tooling, or an editor can disclose readable local files back to the server or write server-controlled content to writable local files, potentially including startup or scheduled-task files. This issue is fixed in version 3.7.6.

Patch / fix

  • sshfs-fuse Debian 12 3.7.3-1.2~deb12u1
  • sshfs-fuse Debian 13 3.7.3-1.2~deb13u1
  • sshfs-fuse Debian 14 3.7.3-1.2

debian advisories DEBIAN-CVE-2026-47187

  • sshfs openSUSE Tumbleweed 3.7.6-1.1

opensuse advisories openSUSE-SU-2026:10952-1

  • sshfs Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.7.6-r0

alpine advisories ALPINE-CVE-2026-47187

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47187 updated cvss 9.3

sshfs: SSHFS Symlink Escape: Rogue SFTP Server → Local File Read/Write

  • Red Hat Enterprise Linux 8 fuse-sshfs
    affected: workaround, no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

  • libfuse sshfs

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.